Your voice can affect how attractive, fertile and faithful people think you are.
An affair is generally a sign things aren't right with someone's relationship. It occurs when one person sees an alternative relationship as a better way to meet their needs than their existing one.
Jealousy works in the same old ways – even in the age of online infidelity.
Seeking monogamy without jealousy? Try ditching the fear of your partner's intimate connections with others and write your own relationship rules, suggests a relationship researcher.
With people living longer lives and dementia on the rise, it's time to consider whether it's verboten for spouses acting as full-time caregivers to seek love and comfort outside their marriages.
The BBC's dark drama reveals just how thin the veneer of middle-class respectability can be.